You have A LOT to learn about making hidden videos.
1. CAMERA PLACEMENT. Next time, try putting it on the floor, behind the toilet, pointing up and towards the bowl.
2. LIGHT BULB CHOICE. Try using G.E.'s "Reveal" light bulbs. They're a little bit more money but give full spectrum lighting. This will avoid that yellow-ish tint to the video.
3. VIDEO EDITING. Go out and buy a cheap video editing software. There are some free and trial versions you can download from online sources.